The clonality and size of V¦Ä5 T cells from a patient with T-ALL at different time points before and after allo-HSCT. A: T-ALL relapse before allo-HSCT. The monoclonal V¦Ä5 product size was 466 bp; B: pre-HSCT; C: 4 weeks post allo-HSCT; D: 8 weeks post allo-HSCT; E: 68 weeks post allo-HSCT. The clonal V¦Ä5 products were 459 and 477 bp. F: 100 weeks post allo-HSCT and disease relapse and G: 108 weeks post allo-HSCT and after one chemotherapy cycle. The same 466 bp monoclonal V¦Ä5 product is observed. The right figure demonstrates the expression level of the monoclonal V¦Ä5 gene at different time points.